1525768530 has 128 divisors (see below), whose sum is σ = 4555305216. Its totient is φ = 321331200.

The previous prime is 1525768501. The next prime is 1525768537. The reversal of 1525768530 is 358675251.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1525768537) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 62470 + ... + 83390.

It is an arithmetic number, because the mean of its divisors is an integer number (35588322).

Almost surely, 2^1525768530 is an apocalyptic number.

1525768530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1525768530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2277652608).

1525768530 is an abundant number, since it is smaller than the sum of its proper divisors (3029536686).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1525768530 is a wasteful number, since it uses less digits than its factorization.

1525768530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20972.

The product of its (nonzero) digits is 252000, while the sum is 42.

The square root of 1525768530 is about 39061.0871584496. The cubic root of 1525768530 is about 1151.2320834097.

The spelling of 1525768530 in words is "one billion, five hundred twenty-five million, seven hundred sixty-eight thousand, five hundred thirty".